Spears performs on ABC's "Good Morning America" at Bill Graham Civic Auditorium in San Francisco on March 27, 2011.

Spears arrives at the 2011 MTV Video Music Awards in Los Angeles on Aug. 28, 2011.

Spears is seen here again at the 2011 MTV Video Music Awards, this time with her former agent-turned-boyfriend Jason Trawick. In December 2011, she announced that she had accepted a marriage proposal from Trawick. However, in January 2013, the couple ended their engagement.

Spears joins fellow "The X Factor" judge Demi Lovato in leaving their signatures in cement at the show's season two premiere at Grauman's Chinese Theatre in Hollywood, Calif., on Sept. 11, 2012.

Spears poses at the premiere of "The Smurfs 2" in Los Angeles on July 28, 2013. Spears recorded the song "Ooh La La" for the movie's soundtrack.